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(!!!!) (Best Overall Pair) 80 National Union NOS 1950 era (56-62/40 and 56-62/40) (best sound)

(!!!!) (Best Overall Pair) 80 National Union NOS 1950 era (56-62/40 and 56-62/40) (best sound)

$ 69.99
(!!!!) (Best Pair #1) 01A RCA Cunningham engraved base NOS 1930's (3.5ma and 3.4ma) (same Gm)

(!!!!) (Best Pair #1) 01A RCA Cunningham engraved base NOS 1930's (3.5ma and 3.4ma) (same Gm)

$ 109.99
(!!!!) (Best Pair #1) 6973 RCA NOS NOS 1969 (42ma and 42.8ma) (close Gm)

(!!!!) (Best Pair #1) 6973 RCA NOS NOS 1969 (42ma and 42.8ma) (close Gm)

$ 219.99
(!!!!) (Best Pair #1) 6BX7GT Sylvania triple mica

(!!!!) (Best Pair #1) 6BX7GT Sylvania triple mica "O" getter NOS 1960 era (74/66.5ma and 78.5/68.5ma) (same Gm)

$ 44.99
(!!!!) (Best Pair #1) 6F8G Raytheon black parallel ribbed plates NOS 1940's (8.8/7.8ma and 7.4/7.6ma) (same Gm)

(!!!!) (Best Pair #1) 6F8G Raytheon black parallel ribbed plates NOS 1940's (8.8/7.8ma and 7.4/7.6ma) (same Gm)

$ 119.99
(!!!!) (Best Pair #1) 6V6GTA GE NOS 1970 era (41.8ma and 43.2ma) (Close Gm matching)

(!!!!) (Best Pair #1) 6V6GTA GE NOS 1970 era (41.8ma and 43.2ma) (Close Gm matching)

$ 149.99
(!!!!) (Best Pair #1) 7868 Sylvania tipped top used/tests like new 1960's (65ma and 66ma) (strong mA and Gm)

(!!!!) (Best Pair #1) 7868 Sylvania tipped top used/tests like new 1960's (65ma and 66ma) (strong mA and Gm)

$ 129.99
(!!!!) (BEST PAIR #1) JAN-CRC-6K6GT RCA black plate 1952 (42.5ma and 43ma)

(!!!!) (BEST PAIR #1) JAN-CRC-6K6GT RCA black plate 1952 (42.5ma and 43ma)

$ 31.99
(!!!!) (Best Pair #2) 01A RCA Cunningham engraved base NOS 1930's (3.3ma and 3.2ma) (same Gm)

(!!!!) (Best Pair #2) 01A RCA Cunningham engraved base NOS 1930's (3.3ma and 3.2ma) (same Gm)

$ 99.99
(!!!!) (Best Pair #2) 12AX7A RCA ribbed plates NOS 1965-1968 (1.4/1.0ma and 1.3/1.1ma) (Fender Rogue, McIntosh)

(!!!!) (Best Pair #2) 12AX7A RCA ribbed plates NOS 1965-1968 (1.4/1.0ma and 1.3/1.1ma) (Fender Rogue, McIntosh)

$ 299.99
(!!!!) (BEST PAIR #2) 5U4GB RCA NOS 1972-1975 era (59-60/40 and 60-60/40) 1-2% matched (best sound)

(!!!!) (BEST PAIR #2) 5U4GB RCA NOS 1972-1975 era (59-60/40 and 60-60/40) 1-2% matched (best sound)

$ 168.88
(!!!!) (Best Pair #2) 6973 RCA NOS NOS 1969 (45.5ma and 49.6ma)

(!!!!) (Best Pair #2) 6973 RCA NOS NOS 1969 (45.5ma and 49.6ma)

$ 209.99
(!!!!) (Best Pair #2) 6BQ5 GE NOS 1966-1980 same build (58.5ma and 60ma)

(!!!!) (Best Pair #2) 6BQ5 GE NOS 1966-1980 same build (58.5ma and 60ma)

$ 139.99
(!!!!) (Best Pair #2) 6BX7GT Sylvania triple mica

(!!!!) (Best Pair #2) 6BX7GT Sylvania triple mica "D" getter NOS 1950's (60/55ma and 52/54ma)

$ 44.99
(!!!!) (Best Pair #2) 6EM7=6EA7 Sylvania coin-base NOS 1970's (1.5ma/73ma and 1.8ma/65ma)

(!!!!) (Best Pair #2) 6EM7=6EA7 Sylvania coin-base NOS 1970's (1.5ma/73ma and 1.8ma/65ma)

$ 51.99
(!!!!) (Best Pair #2) 6GH8A GE by EI Yugoslavia NOS copper grid posts 1970's (16.8/12.8ma and 16.0/13.5ma)

(!!!!) (Best Pair #2) 6GH8A GE by EI Yugoslavia NOS copper grid posts 1970's (16.8/12.8ma and 16.0/13.5ma)

$ 24.99
(!!!!) (Best Pair #2) 6U8A Philips by Sylvania JAN NOS 1986 (16,8/9.0ma and 16.8/9.4ma)

(!!!!) (Best Pair #2) 6U8A Philips by Sylvania JAN NOS 1986 (16,8/9.0ma and 16.8/9.4ma)

$ 34.99
(!!!!) (Best Pair #2) 6U8A Philips by Sylvania NOS 1986 (20.5/8.2ma and 20.0/8.0ma)

(!!!!) (Best Pair #2) 6U8A Philips by Sylvania NOS 1986 (20.5/8.2ma and 20.0/8.0ma)

$ 34.99
(!!!!) (Best Pair #2) 7247=12DW7 Mullard UK NOS rebranded RCA 1972 (1.5/11.5ma and 1.7/11.4ma) 1-3% matched

(!!!!) (Best Pair #2) 7247=12DW7 Mullard UK NOS rebranded RCA 1972 (1.5/11.5ma and 1.7/11.4ma) 1-3% matched

$ 149.99
(!!!!) (Best Pair #2) EC92=6AB4 Siemens Halske NOS branded Philips 1967 (9ma and 9ma)

(!!!!) (Best Pair #2) EC92=6AB4 Siemens Halske NOS branded Philips 1967 (9ma and 9ma)

$ 139.99
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